Feed-water-supply-regulating apparatus.



PATENTED JUNE 28, 1904.

J DAVIE. FEED WATER SUPPLY REGULATING APPARATUS.

APPLICATION FILED OUT. 9, 1903.

2 SHEETS-SHEET 1 N0 MODEL.

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N0 MODEL.

PATENTED JUNE 28, 1904. J'. DAVIE. FEED WATER SUPPLY REGULATING APPARATUS.

APPLICATION FILED 001'. 9, 1903.

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UNITED STATES Patented June 28, 1904.

PATENT OEIICE.

JAMESDAVIE, OF GLASGOW, SCOTLAND.-

FEED-WAT-ER-SUPPLY-REGULATING APPARATUS.

SPECIFICATION forming part of Letters.Patent No. 763,730, dated June 28, 1904.

Application filed October 9, 1903 V the King of Great Britain and Ireland, and a resident of Glasgow, Scotland, have invented certain new and useful Improvements in Feed- Water-Supply-Regulating Apparatus, (for which I have filed an application for British Patent No. 11,265, dated May 18, 1903;) and I do hereby declare the following to be a full, clear, and exact description of the same.

This invention relates to improved apparatus for automatically regulating the supply of feed-water from a feed-pump or other source to steam-boilers, sea-water evaporators, and other steam-generators.

In the accompanying drawings, Figure 1 represents a sectional elevation of the improved apparatus. Fig. 2 represents the apparatus in elevation, partly insection, combined with means adapted to operate the throttle-valve of a direct-acting steam-pump serving as the water-feed.

a represents a float-provided tank which is connected to the steam-generator by branch pipes a a which respectively connect the steam and water spaces of the tank and generator and insure correspondence of waterlevel therein, and Z) represents the float, which is connected by a lever Z) andlink Z2 to the water-flow controller 0 The controller consists of a hollow piston adapted to work in equilibrium in a cylinder d, fitted to and projecting from the tank side, the piston having its ends closed and the cylinder having one of its ends open to, and the other end, which is closed by a stufling-box d, connected by a pipe (Z with, thesteam-space of the tank interior. stuffing-box is closed by a screw-plug c', and the stufling-box is fitted in opposite relation to the screw-plug with a spring-fitted stoprod 6, which serves to determine the outthrust of the controller and enables its working order to be readily tested. The controller has three ports 0 c 0 which respectively communicate with corresponding ports 01 d d in the cylinder and which respectively communicate by pipes f g it with the pump-discharge, the steam-generator, and the pump-suction, the inlet-ports 0 d of the controller and cyl- The end of the piston adjacent to the Serial No. 176,336. '(No model.)

inder being always in connection, while the outlet-ports o oof the controller, respectively corresponding with those d d of the cylinder,

respectively communicate therewith in the respective cases of the generator needing or not needing further water. Thus when the water-level in the generator and in the tank is at or below the normal level the ports 0 d, leading to the generator, are open to the pump-feed and the ports 0 OZ are closed,

while when the water-level in the generator and in the tank is above the normal the ports 12 leading to the pump-section, are open to the pump-feed and the ports 0 d are closed. When working in connection with a direct acting steam-pump, the water returning by 0', fitted with a weighted ram 7', which at its bottom is made hollow, as at and provided with a port f adapted to communicate with a port 2" in the cylinder leading to a continuation h of said connection it. The ram projects upwardly through a stuifing-box 2' and is connected by suitable gear (not shown) adapted to act on the steam throttle-valve of the pump, so that when the controller-ports 0* (Z are open and the pressure in the connection It is sufficient to raise the ram the ports 7' z'" of the ram and cylinder communicate and allow the water to pass through from the pipe it to its continuation 71 in return to the pump, while the lift of the ram, acting through respondingly slow down the pump.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In combination with a steam-generator and a float-fitted tank having their steam and water spaces respectively connected so as to insure correspondence of water-level and the float operated by the water-level and a water-feed pump, an open-ended cylinder horizontally projecting from the tank side and having its inner end open to the tank steam-space and a water-inlet communicating with the pumpdelivery and two water-outlets respectively communicating with the generator and the pump-suction, a stuffing-box closing the cylinder outer end, a pipe connecting the cylinder outer end with the tank steam-space, a hollow piston adapted to work in the cylinder in equilibrium under the opposing steam-pressures of the tank and having a water-inlet always communicating with that of the cylinder and two water-outlets respectively communicating with those of the cylinder to the generator and. the pump-suction, a screw-plug closing the piston outer end, a stop-rod having a pressure-spring fitted to the stuflfing-box in opposite relation to the piston and serving to limit the outthrust of the piston and to test its working, and means of connecting the piston to the float, the apparatus serving to supply water to the generator or to return it to the pump-suction, as set forth.

2. In combination with a steam-generator and a float-fitted tank having their steam and water spaces respectively connected so as to insure correspondence of water-level and the float operated by the water-level and a directacting steam-pump, an open-ended cylinder horizontally projecting from the tank side and having its inner end open to the tank steamspace and a water-inlet communicating with the pump-delivery and two water-outlets respectively communicating with the generator and the pump-suction, a ram fitted to the connection between the cylinder and the pumpsuction and operated by water-pressure in such connection, a stufling-box closing the cylinder outer end, a pipe connecting the cylinder outer end with the tank steam-space, a hollow piston adapted to work in the cylinder in equilibrium under the opposing steam-pressures of the tank and having a water-inlet al- Ways communicating with that of the cylinder and two water-outlets respectively communicating with those of the cylinder to the generator and the pump-suction, a screw-plug closing the piston outer end, a stop-rod having a pressure-spring fitted to the stuffing-box in opposite relation to the piston and serving to limit the outthrust of the piston and to test its working, means of connecting the piston to the float, and means of connecting the ram to the steam throttle-valve of the pump, the apparatus serving to supply water to the generator or to return it to the pump-suction and slow down the pump, as set forth.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JAMES DAVIE. Witnesses:

CHAR-LES VVATT, ANDREW WALKER. 

